Mineralpedia Details for Proustite
Proustite
Named in honor of Joseph Louis Proust, a celebrated French chemist who was able to prove that substances combine in constant and definite proportions. Proustite is a late-forming hydrothermal mineral that develops in oxidized and enriched zones of the deposit along with other silver-bearing minerals and sulfides. There are hundreds of localities for Proustite, notable localities include Germany, Romania, the Czech Republic, France, Italy, the United States, Chile, and Mexico.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/proustite.pdf
- Formula
- Ag3AsS3
- Crystal System
- Trigonal
- Crystal Habit
- Massive, Crystalline - Poor, Blocky
- Cleavage
- None, None, None
- Luster
- Sub Metallic
- Color
- vermilion, reddish gray
- Streak
- vermilion red
- Class
- Trigonal - Hexagonal Scalenohedral
- Fracture
- Brittle - Sectile
- Hardness
- 2-2.5
- WebMineral
- View Proustite
- Mindat
- View Proustite
PROUSTITE from Imiter mine, Tinghir Prov., Drâa-Tafilalet, Morocco
- Special Info
- Phillips Collection
Deep, bright red prismatic micro crystals to 1mm throughout sulfide matrix.
Proustite from Jachymov, Erzgegirge, Bohemia, Czech Republic
Nice old specimen of dull grey Arsenic with associated ruby red Proustite crystals 1mm.
Proustite from O'Brien mine, Cobalt, Ontario, Canada
Cherry red needles of Proustite to 3mm in several vugs with Safflorit
Proustite from San Genaro mine, Castrovirreyna, Huancavalica, Peru
Deep ruby red single, nice crystal to 1cm.
Proustite from Schneeberg dist., Erzgebirge, Saxony, Germany
An old-time specimen from this historic district of 1-2mm cherry red Proustite crystals.
